1 #define _FILE_OFFSET_BITS 64 2 3 #include <linux/kernel.h> 4 5 #include <byteswap.h> 6 #include <unistd.h> 7 #include <sys/types.h> 8 #include <sys/mman.h> 9 10 #include "evlist.h" 11 #include "evsel.h" 12 #include "session.h" 13 #include "tool.h" 14 #include "sort.h" 15 #include "util.h" 16 #include "cpumap.h" 17 18 static int perf_session__open(struct perf_session *self, bool force) 19 { 20 struct stat input_stat; 21 22 if (!strcmp(self->filename, "-")) { 23 self->fd_pipe = true; 24 self->fd = STDIN_FILENO; 25 26 if (perf_session__read_header(self, self->fd) < 0) 27 pr_err("incompatible file format (rerun with -v to learn more)"); 28 29 return 0; 30 } 31 32 self->fd = open(self->filename, O_RDONLY); 33 if (self->fd < 0) { 34 int err = errno; 35 36 pr_err("failed to open %s: %s", self->filename, strerror(err)); 37 if (err == ENOENT && !strcmp(self->filename, "perf.data")) 38 pr_err(" (try 'perf record' first)"); 39 pr_err("\n"); 40 return -errno; 41 } 42 43 if (fstat(self->fd, &input_stat) < 0) 44 goto out_close; 45 46 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { 47 pr_err("file %s not owned by current user or root\n", 48 self->filename); 49 goto out_close; 50 } 51 52 if (!input_stat.st_size) { 53 pr_info("zero-sized file (%s), nothing to do!\n", 54 self->filename); 55 goto out_close; 56 } 57 58 if (perf_session__read_header(self, self->fd) < 0) { 59 pr_err("incompatible file format (rerun with -v to learn more)"); 60 goto out_close; 61 } 62 63 if (!perf_evlist__valid_sample_type(self->evlist)) { 64 pr_err("non matching sample_type"); 65 goto out_close; 66 } 67 68 if (!perf_evlist__valid_sample_id_all(self->evlist)) { 69 pr_err("non matching sample_id_all"); 70 goto out_close; 71 } 72 73 self->size = input_stat.st_size; 74 return 0; 75 76 out_close: 77 close(self->fd); 78 self->fd = -1; 79 return -1; 80 } 81 82 void perf_session__update_sample_type(struct perf_session *self) 83 { 84 self->sample_type = perf_evlist__sample_type(self->evlist); 85 self->sample_size = __perf_evsel__sample_size(self->sample_type); 86 self->sample_id_all = perf_evlist__sample_id_all(self->evlist); 87 self->id_hdr_size = perf_evlist__id_hdr_size(self->evlist); 88 self->host_machine.id_hdr_size = self->id_hdr_size; 89 } 90 91 int perf_session__create_kernel_maps(struct perf_session *self) 92 { 93 int ret = machine__create_kernel_maps(&self->host_machine); 94 95 if (ret >= 0) 96 ret = machines__create_guest_kernel_maps(&self->machines); 97 return ret; 98 } 99 100 static void perf_session__destroy_kernel_maps(struct perf_session *self) 101 { 102 machine__destroy_kernel_maps(&self->host_machine); 103 machines__destroy_guest_kernel_maps(&self->machines); 104 } 105 106 struct perf_session *perf_session__new(const char *filename, int mode, 107 bool force, bool repipe, 108 struct perf_tool *tool) 109 { 110 struct perf_session *self; 111 struct stat st; 112 size_t len; 113 114 if (!filename || !strlen(filename)) { 115 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 116 filename = "-"; 117 else 118 filename = "perf.data"; 119 } 120 121 len = strlen(filename); 122 self = zalloc(sizeof(*self) + len); 123 124 if (self == NULL) 125 goto out; 126 127 memcpy(self->filename, filename, len); 128 /* 129 * On 64bit we can mmap the data file in one go. No need for tiny mmap 130 * slices. On 32bit we use 32MB. 131 */ 132 #if BITS_PER_LONG == 64 133 self->mmap_window = ULLONG_MAX; 134 #else 135 self->mmap_window = 32 * 1024 * 1024ULL; 136 #endif 137 self->machines = RB_ROOT; 138 self->repipe = repipe; 139 INIT_LIST_HEAD(&self->ordered_samples.samples); 140 INIT_LIST_HEAD(&self->ordered_samples.sample_cache); 141 INIT_LIST_HEAD(&self->ordered_samples.to_free); 142 machine__init(&self->host_machine, "", HOST_KERNEL_ID); 143 hists__init(&self->hists); 144 145 if (mode == O_RDONLY) { 146 if (perf_session__open(self, force) < 0) 147 goto out_delete; 148 perf_session__update_sample_type(self); 149 } else if (mode == O_WRONLY) { 150 /* 151 * In O_RDONLY mode this will be performed when reading the 152 * kernel MMAP event, in perf_event__process_mmap(). 153 */ 154 if (perf_session__create_kernel_maps(self) < 0) 155 goto out_delete; 156 } 157 158 if (tool && tool->ordering_requires_timestamps && 159 tool->ordered_samples && !self->sample_id_all) { 160 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 161 tool->ordered_samples = false; 162 } 163 164 out: 165 return self; 166 out_delete: 167 perf_session__delete(self); 168 return NULL; 169 } 170 171 static void machine__delete_dead_threads(struct machine *machine) 172 { 173 struct thread *n, *t; 174 175 list_for_each_entry_safe(t, n, &machine->dead_threads, node) { 176 list_del(&t->node); 177 thread__delete(t); 178 } 179 } 180 181 static void perf_session__delete_dead_threads(struct perf_session *session) 182 { 183 machine__delete_dead_threads(&session->host_machine); 184 } 185 186 static void machine__delete_threads(struct machine *self) 187 { 188 struct rb_node *nd = rb_first(&self->threads); 189 190 while (nd) { 191 struct thread *t = rb_entry(nd, struct thread, rb_node); 192 193 rb_erase(&t->rb_node, &self->threads); 194 nd = rb_next(nd); 195 thread__delete(t); 196 } 197 } 198 199 static void perf_session__delete_threads(struct perf_session *session) 200 { 201 machine__delete_threads(&session->host_machine); 202 } 203 204 void perf_session__delete(struct perf_session *self) 205 { 206 perf_session__destroy_kernel_maps(self); 207 perf_session__delete_dead_threads(self); 208 perf_session__delete_threads(self); 209 machine__exit(&self->host_machine); 210 close(self->fd); 211 free(self); 212 } 213 214 void machine__remove_thread(struct machine *self, struct thread *th) 215 { 216 self->last_match = NULL; 217 rb_erase(&th->rb_node, &self->threads); 218 /* 219 * We may have references to this thread, for instance in some hist_entry 220 * instances, so just move them to a separate list. 221 */ 222 list_add_tail(&th->node, &self->dead_threads); 223 } 224 225 static bool symbol__match_parent_regex(struct symbol *sym) 226 { 227 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) 228 return 1; 229 230 return 0; 231 } 232 233 static const u8 cpumodes[] = { 234 PERF_RECORD_MISC_USER, 235 PERF_RECORD_MISC_KERNEL, 236 PERF_RECORD_MISC_GUEST_USER, 237 PERF_RECORD_MISC_GUEST_KERNEL 238 }; 239 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8)) 240 241 static void ip__resolve_ams(struct machine *self, struct thread *thread, 242 struct addr_map_symbol *ams, 243 u64 ip) 244 { 245 struct addr_location al; 246 size_t i; 247 u8 m; 248 249 memset(&al, 0, sizeof(al)); 250 251 for (i = 0; i < NCPUMODES; i++) { 252 m = cpumodes[i]; 253 /* 254 * We cannot use the header.misc hint to determine whether a 255 * branch stack address is user, kernel, guest, hypervisor. 256 * Branches may straddle the kernel/user/hypervisor boundaries. 257 * Thus, we have to try consecutively until we find a match 258 * or else, the symbol is unknown 259 */ 260 thread__find_addr_location(thread, self, m, MAP__FUNCTION, 261 ip, &al, NULL); 262 if (al.sym) 263 goto found; 264 } 265 found: 266 ams->addr = ip; 267 ams->al_addr = al.addr; 268 ams->sym = al.sym; 269 ams->map = al.map; 270 } 271 272 struct branch_info *machine__resolve_bstack(struct machine *self, 273 struct thread *thr, 274 struct branch_stack *bs) 275 { 276 struct branch_info *bi; 277 unsigned int i; 278 279 bi = calloc(bs->nr, sizeof(struct branch_info)); 280 if (!bi) 281 return NULL; 282 283 for (i = 0; i < bs->nr; i++) { 284 ip__resolve_ams(self, thr, &bi[i].to, bs->entries[i].to); 285 ip__resolve_ams(self, thr, &bi[i].from, bs->entries[i].from); 286 bi[i].flags = bs->entries[i].flags; 287 } 288 return bi; 289 } 290 291 int machine__resolve_callchain(struct machine *self, 292 struct thread *thread, 293 struct ip_callchain *chain, 294 struct symbol **parent) 295 { 296 u8 cpumode = PERF_RECORD_MISC_USER; 297 unsigned int i; 298 int err; 299 300 callchain_cursor_reset(&callchain_cursor); 301 302 if (chain->nr > PERF_MAX_STACK_DEPTH) { 303 pr_warning("corrupted callchain. skipping...\n"); 304 return 0; 305 } 306 307 for (i = 0; i < chain->nr; i++) { 308 u64 ip; 309 struct addr_location al; 310 311 if (callchain_param.order == ORDER_CALLEE) 312 ip = chain->ips[i]; 313 else 314 ip = chain->ips[chain->nr - i - 1]; 315 316 if (ip >= PERF_CONTEXT_MAX) { 317 switch (ip) { 318 case PERF_CONTEXT_HV: 319 cpumode = PERF_RECORD_MISC_HYPERVISOR; break; 320 case PERF_CONTEXT_KERNEL: 321 cpumode = PERF_RECORD_MISC_KERNEL; break; 322 case PERF_CONTEXT_USER: 323 cpumode = PERF_RECORD_MISC_USER; break; 324 default: 325 pr_debug("invalid callchain context: " 326 "%"PRId64"\n", (s64) ip); 327 /* 328 * It seems the callchain is corrupted. 329 * Discard all. 330 */ 331 callchain_cursor_reset(&callchain_cursor); 332 return 0; 333 } 334 continue; 335 } 336 337 al.filtered = false; 338 thread__find_addr_location(thread, self, cpumode, 339 MAP__FUNCTION, ip, &al, NULL); 340 if (al.sym != NULL) { 341 if (sort__has_parent && !*parent && 342 symbol__match_parent_regex(al.sym)) 343 *parent = al.sym; 344 if (!symbol_conf.use_callchain) 345 break; 346 } 347 348 err = callchain_cursor_append(&callchain_cursor, 349 ip, al.map, al.sym); 350 if (err) 351 return err; 352 } 353 354 return 0; 355 } 356 357 static int process_event_synth_tracing_data_stub(union perf_event *event __used, 358 struct perf_session *session __used) 359 { 360 dump_printf(": unhandled!\n"); 361 return 0; 362 } 363 364 static int process_event_synth_attr_stub(union perf_event *event __used, 365 struct perf_evlist **pevlist __used) 366 { 367 dump_printf(": unhandled!\n"); 368 return 0; 369 } 370 371 static int process_event_sample_stub(struct perf_tool *tool __used, 372 union perf_event *event __used, 373 struct perf_sample *sample __used, 374 struct perf_evsel *evsel __used, 375 struct machine *machine __used) 376 { 377 dump_printf(": unhandled!\n"); 378 return 0; 379 } 380 381 static int process_event_stub(struct perf_tool *tool __used, 382 union perf_event *event __used, 383 struct perf_sample *sample __used, 384 struct machine *machine __used) 385 { 386 dump_printf(": unhandled!\n"); 387 return 0; 388 } 389 390 static int process_finished_round_stub(struct perf_tool *tool __used, 391 union perf_event *event __used, 392 struct perf_session *perf_session __used) 393 { 394 dump_printf(": unhandled!\n"); 395 return 0; 396 } 397 398 static int process_event_type_stub(struct perf_tool *tool __used, 399 union perf_event *event __used) 400 { 401 dump_printf(": unhandled!\n"); 402 return 0; 403 } 404 405 static int process_finished_round(struct perf_tool *tool, 406 union perf_event *event, 407 struct perf_session *session); 408 409 static void perf_tool__fill_defaults(struct perf_tool *tool) 410 { 411 if (tool->sample == NULL) 412 tool->sample = process_event_sample_stub; 413 if (tool->mmap == NULL) 414 tool->mmap = process_event_stub; 415 if (tool->comm == NULL) 416 tool->comm = process_event_stub; 417 if (tool->fork == NULL) 418 tool->fork = process_event_stub; 419 if (tool->exit == NULL) 420 tool->exit = process_event_stub; 421 if (tool->lost == NULL) 422 tool->lost = perf_event__process_lost; 423 if (tool->read == NULL) 424 tool->read = process_event_sample_stub; 425 if (tool->throttle == NULL) 426 tool->throttle = process_event_stub; 427 if (tool->unthrottle == NULL) 428 tool->unthrottle = process_event_stub; 429 if (tool->attr == NULL) 430 tool->attr = process_event_synth_attr_stub; 431 if (tool->event_type == NULL) 432 tool->event_type = process_event_type_stub; 433 if (tool->tracing_data == NULL) 434 tool->tracing_data = process_event_synth_tracing_data_stub; 435 if (tool->build_id == NULL) 436 tool->build_id = process_finished_round_stub; 437 if (tool->finished_round == NULL) { 438 if (tool->ordered_samples) 439 tool->finished_round = process_finished_round; 440 else 441 tool->finished_round = process_finished_round_stub; 442 } 443 } 444 445 void mem_bswap_64(void *src, int byte_size) 446 { 447 u64 *m = src; 448 449 while (byte_size > 0) { 450 *m = bswap_64(*m); 451 byte_size -= sizeof(u64); 452 ++m; 453 } 454 } 455 456 static void swap_sample_id_all(union perf_event *event, void *data) 457 { 458 void *end = (void *) event + event->header.size; 459 int size = end - data; 460 461 BUG_ON(size % sizeof(u64)); 462 mem_bswap_64(data, size); 463 } 464 465 static void perf_event__all64_swap(union perf_event *event, 466 bool sample_id_all __used) 467 { 468 struct perf_event_header *hdr = &event->header; 469 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 470 } 471 472 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 473 { 474 event->comm.pid = bswap_32(event->comm.pid); 475 event->comm.tid = bswap_32(event->comm.tid); 476 477 if (sample_id_all) { 478 void *data = &event->comm.comm; 479 480 data += ALIGN(strlen(data) + 1, sizeof(u64)); 481 swap_sample_id_all(event, data); 482 } 483 } 484 485 static void perf_event__mmap_swap(union perf_event *event, 486 bool sample_id_all) 487 { 488 event->mmap.pid = bswap_32(event->mmap.pid); 489 event->mmap.tid = bswap_32(event->mmap.tid); 490 event->mmap.start = bswap_64(event->mmap.start); 491 event->mmap.len = bswap_64(event->mmap.len); 492 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 493 494 if (sample_id_all) { 495 void *data = &event->mmap.filename; 496 497 data += ALIGN(strlen(data) + 1, sizeof(u64)); 498 swap_sample_id_all(event, data); 499 } 500 } 501 502 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 503 { 504 event->fork.pid = bswap_32(event->fork.pid); 505 event->fork.tid = bswap_32(event->fork.tid); 506 event->fork.ppid = bswap_32(event->fork.ppid); 507 event->fork.ptid = bswap_32(event->fork.ptid); 508 event->fork.time = bswap_64(event->fork.time); 509 510 if (sample_id_all) 511 swap_sample_id_all(event, &event->fork + 1); 512 } 513 514 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 515 { 516 event->read.pid = bswap_32(event->read.pid); 517 event->read.tid = bswap_32(event->read.tid); 518 event->read.value = bswap_64(event->read.value); 519 event->read.time_enabled = bswap_64(event->read.time_enabled); 520 event->read.time_running = bswap_64(event->read.time_running); 521 event->read.id = bswap_64(event->read.id); 522 523 if (sample_id_all) 524 swap_sample_id_all(event, &event->read + 1); 525 } 526 527 static u8 revbyte(u8 b) 528 { 529 int rev = (b >> 4) | ((b & 0xf) << 4); 530 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 531 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 532 return (u8) rev; 533 } 534 535 /* 536 * XXX this is hack in attempt to carry flags bitfield 537 * throught endian village. ABI says: 538 * 539 * Bit-fields are allocated from right to left (least to most significant) 540 * on little-endian implementations and from left to right (most to least 541 * significant) on big-endian implementations. 542 * 543 * The above seems to be byte specific, so we need to reverse each 544 * byte of the bitfield. 'Internet' also says this might be implementation 545 * specific and we probably need proper fix and carry perf_event_attr 546 * bitfield flags in separate data file FEAT_ section. Thought this seems 547 * to work for now. 548 */ 549 static void swap_bitfield(u8 *p, unsigned len) 550 { 551 unsigned i; 552 553 for (i = 0; i < len; i++) { 554 *p = revbyte(*p); 555 p++; 556 } 557 } 558 559 /* exported for swapping attributes in file header */ 560 void perf_event__attr_swap(struct perf_event_attr *attr) 561 { 562 attr->type = bswap_32(attr->type); 563 attr->size = bswap_32(attr->size); 564 attr->config = bswap_64(attr->config); 565 attr->sample_period = bswap_64(attr->sample_period); 566 attr->sample_type = bswap_64(attr->sample_type); 567 attr->read_format = bswap_64(attr->read_format); 568 attr->wakeup_events = bswap_32(attr->wakeup_events); 569 attr->bp_type = bswap_32(attr->bp_type); 570 attr->bp_addr = bswap_64(attr->bp_addr); 571 attr->bp_len = bswap_64(attr->bp_len); 572 573 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 574 } 575 576 static void perf_event__hdr_attr_swap(union perf_event *event, 577 bool sample_id_all __used) 578 { 579 size_t size; 580 581 perf_event__attr_swap(&event->attr.attr); 582 583 size = event->header.size; 584 size -= (void *)&event->attr.id - (void *)event; 585 mem_bswap_64(event->attr.id, size); 586 } 587 588 static void perf_event__event_type_swap(union perf_event *event, 589 bool sample_id_all __used) 590 { 591 event->event_type.event_type.event_id = 592 bswap_64(event->event_type.event_type.event_id); 593 } 594 595 static void perf_event__tracing_data_swap(union perf_event *event, 596 bool sample_id_all __used) 597 { 598 event->tracing_data.size = bswap_32(event->tracing_data.size); 599 } 600 601 typedef void (*perf_event__swap_op)(union perf_event *event, 602 bool sample_id_all); 603 604 static perf_event__swap_op perf_event__swap_ops[] = { 605 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 606 [PERF_RECORD_COMM] = perf_event__comm_swap, 607 [PERF_RECORD_FORK] = perf_event__task_swap, 608 [PERF_RECORD_EXIT] = perf_event__task_swap, 609 [PERF_RECORD_LOST] = perf_event__all64_swap, 610 [PERF_RECORD_READ] = perf_event__read_swap, 611 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 612 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 613 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 614 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 615 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 616 [PERF_RECORD_HEADER_MAX] = NULL, 617 }; 618 619 struct sample_queue { 620 u64 timestamp; 621 u64 file_offset; 622 union perf_event *event; 623 struct list_head list; 624 }; 625 626 static void perf_session_free_sample_buffers(struct perf_session *session) 627 { 628 struct ordered_samples *os = &session->ordered_samples; 629 630 while (!list_empty(&os->to_free)) { 631 struct sample_queue *sq; 632 633 sq = list_entry(os->to_free.next, struct sample_queue, list); 634 list_del(&sq->list); 635 free(sq); 636 } 637 } 638 639 static int perf_session_deliver_event(struct perf_session *session, 640 union perf_event *event, 641 struct perf_sample *sample, 642 struct perf_tool *tool, 643 u64 file_offset); 644 645 static void flush_sample_queue(struct perf_session *s, 646 struct perf_tool *tool) 647 { 648 struct ordered_samples *os = &s->ordered_samples; 649 struct list_head *head = &os->samples; 650 struct sample_queue *tmp, *iter; 651 struct perf_sample sample; 652 u64 limit = os->next_flush; 653 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 654 unsigned idx = 0, progress_next = os->nr_samples / 16; 655 int ret; 656 657 if (!tool->ordered_samples || !limit) 658 return; 659 660 list_for_each_entry_safe(iter, tmp, head, list) { 661 if (iter->timestamp > limit) 662 break; 663 664 ret = perf_session__parse_sample(s, iter->event, &sample); 665 if (ret) 666 pr_err("Can't parse sample, err = %d\n", ret); 667 else 668 perf_session_deliver_event(s, iter->event, &sample, tool, 669 iter->file_offset); 670 671 os->last_flush = iter->timestamp; 672 list_del(&iter->list); 673 list_add(&iter->list, &os->sample_cache); 674 if (++idx >= progress_next) { 675 progress_next += os->nr_samples / 16; 676 ui_progress__update(idx, os->nr_samples, 677 "Processing time ordered events..."); 678 } 679 } 680 681 if (list_empty(head)) { 682 os->last_sample = NULL; 683 } else if (last_ts <= limit) { 684 os->last_sample = 685 list_entry(head->prev, struct sample_queue, list); 686 } 687 688 os->nr_samples = 0; 689 } 690 691 /* 692 * When perf record finishes a pass on every buffers, it records this pseudo 693 * event. 694 * We record the max timestamp t found in the pass n. 695 * Assuming these timestamps are monotonic across cpus, we know that if 696 * a buffer still has events with timestamps below t, they will be all 697 * available and then read in the pass n + 1. 698 * Hence when we start to read the pass n + 2, we can safely flush every 699 * events with timestamps below t. 700 * 701 * ============ PASS n ================= 702 * CPU 0 | CPU 1 703 * | 704 * cnt1 timestamps | cnt2 timestamps 705 * 1 | 2 706 * 2 | 3 707 * - | 4 <--- max recorded 708 * 709 * ============ PASS n + 1 ============== 710 * CPU 0 | CPU 1 711 * | 712 * cnt1 timestamps | cnt2 timestamps 713 * 3 | 5 714 * 4 | 6 715 * 5 | 7 <---- max recorded 716 * 717 * Flush every events below timestamp 4 718 * 719 * ============ PASS n + 2 ============== 720 * CPU 0 | CPU 1 721 * | 722 * cnt1 timestamps | cnt2 timestamps 723 * 6 | 8 724 * 7 | 9 725 * - | 10 726 * 727 * Flush every events below timestamp 7 728 * etc... 729 */ 730 static int process_finished_round(struct perf_tool *tool, 731 union perf_event *event __used, 732 struct perf_session *session) 733 { 734 flush_sample_queue(session, tool); 735 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 736 737 return 0; 738 } 739 740 /* The queue is ordered by time */ 741 static void __queue_event(struct sample_queue *new, struct perf_session *s) 742 { 743 struct ordered_samples *os = &s->ordered_samples; 744 struct sample_queue *sample = os->last_sample; 745 u64 timestamp = new->timestamp; 746 struct list_head *p; 747 748 ++os->nr_samples; 749 os->last_sample = new; 750 751 if (!sample) { 752 list_add(&new->list, &os->samples); 753 os->max_timestamp = timestamp; 754 return; 755 } 756 757 /* 758 * last_sample might point to some random place in the list as it's 759 * the last queued event. We expect that the new event is close to 760 * this. 761 */ 762 if (sample->timestamp <= timestamp) { 763 while (sample->timestamp <= timestamp) { 764 p = sample->list.next; 765 if (p == &os->samples) { 766 list_add_tail(&new->list, &os->samples); 767 os->max_timestamp = timestamp; 768 return; 769 } 770 sample = list_entry(p, struct sample_queue, list); 771 } 772 list_add_tail(&new->list, &sample->list); 773 } else { 774 while (sample->timestamp > timestamp) { 775 p = sample->list.prev; 776 if (p == &os->samples) { 777 list_add(&new->list, &os->samples); 778 return; 779 } 780 sample = list_entry(p, struct sample_queue, list); 781 } 782 list_add(&new->list, &sample->list); 783 } 784 } 785 786 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 787 788 static int perf_session_queue_event(struct perf_session *s, union perf_event *event, 789 struct perf_sample *sample, u64 file_offset) 790 { 791 struct ordered_samples *os = &s->ordered_samples; 792 struct list_head *sc = &os->sample_cache; 793 u64 timestamp = sample->time; 794 struct sample_queue *new; 795 796 if (!timestamp || timestamp == ~0ULL) 797 return -ETIME; 798 799 if (timestamp < s->ordered_samples.last_flush) { 800 printf("Warning: Timestamp below last timeslice flush\n"); 801 return -EINVAL; 802 } 803 804 if (!list_empty(sc)) { 805 new = list_entry(sc->next, struct sample_queue, list); 806 list_del(&new->list); 807 } else if (os->sample_buffer) { 808 new = os->sample_buffer + os->sample_buffer_idx; 809 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 810 os->sample_buffer = NULL; 811 } else { 812 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 813 if (!os->sample_buffer) 814 return -ENOMEM; 815 list_add(&os->sample_buffer->list, &os->to_free); 816 os->sample_buffer_idx = 2; 817 new = os->sample_buffer + 1; 818 } 819 820 new->timestamp = timestamp; 821 new->file_offset = file_offset; 822 new->event = event; 823 824 __queue_event(new, s); 825 826 return 0; 827 } 828 829 static void callchain__printf(struct perf_sample *sample) 830 { 831 unsigned int i; 832 833 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 834 835 for (i = 0; i < sample->callchain->nr; i++) 836 printf("..... %2d: %016" PRIx64 "\n", 837 i, sample->callchain->ips[i]); 838 } 839 840 static void branch_stack__printf(struct perf_sample *sample) 841 { 842 uint64_t i; 843 844 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 845 846 for (i = 0; i < sample->branch_stack->nr; i++) 847 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 848 i, sample->branch_stack->entries[i].from, 849 sample->branch_stack->entries[i].to); 850 } 851 852 static void perf_session__print_tstamp(struct perf_session *session, 853 union perf_event *event, 854 struct perf_sample *sample) 855 { 856 if (event->header.type != PERF_RECORD_SAMPLE && 857 !session->sample_id_all) { 858 fputs("-1 -1 ", stdout); 859 return; 860 } 861 862 if ((session->sample_type & PERF_SAMPLE_CPU)) 863 printf("%u ", sample->cpu); 864 865 if (session->sample_type & PERF_SAMPLE_TIME) 866 printf("%" PRIu64 " ", sample->time); 867 } 868 869 static void dump_event(struct perf_session *session, union perf_event *event, 870 u64 file_offset, struct perf_sample *sample) 871 { 872 if (!dump_trace) 873 return; 874 875 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 876 file_offset, event->header.size, event->header.type); 877 878 trace_event(event); 879 880 if (sample) 881 perf_session__print_tstamp(session, event, sample); 882 883 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 884 event->header.size, perf_event__name(event->header.type)); 885 } 886 887 static void dump_sample(struct perf_session *session, union perf_event *event, 888 struct perf_sample *sample) 889 { 890 if (!dump_trace) 891 return; 892 893 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 894 event->header.misc, sample->pid, sample->tid, sample->ip, 895 sample->period, sample->addr); 896 897 if (session->sample_type & PERF_SAMPLE_CALLCHAIN) 898 callchain__printf(sample); 899 900 if (session->sample_type & PERF_SAMPLE_BRANCH_STACK) 901 branch_stack__printf(sample); 902 } 903 904 static struct machine * 905 perf_session__find_machine_for_cpumode(struct perf_session *session, 906 union perf_event *event) 907 { 908 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 909 910 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 911 u32 pid; 912 913 if (event->header.type == PERF_RECORD_MMAP) 914 pid = event->mmap.pid; 915 else 916 pid = event->ip.pid; 917 918 return perf_session__find_machine(session, pid); 919 } 920 921 return perf_session__find_host_machine(session); 922 } 923 924 static int perf_session_deliver_event(struct perf_session *session, 925 union perf_event *event, 926 struct perf_sample *sample, 927 struct perf_tool *tool, 928 u64 file_offset) 929 { 930 struct perf_evsel *evsel; 931 struct machine *machine; 932 933 dump_event(session, event, file_offset, sample); 934 935 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 936 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 937 /* 938 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 939 * because the tools right now may apply filters, discarding 940 * some of the samples. For consistency, in the future we 941 * should have something like nr_filtered_samples and remove 942 * the sample->period from total_sample_period, etc, KISS for 943 * now tho. 944 * 945 * Also testing against NULL allows us to handle files without 946 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 947 * future probably it'll be a good idea to restrict event 948 * processing via perf_session to files with both set. 949 */ 950 hists__inc_nr_events(&evsel->hists, event->header.type); 951 } 952 953 machine = perf_session__find_machine_for_cpumode(session, event); 954 955 switch (event->header.type) { 956 case PERF_RECORD_SAMPLE: 957 dump_sample(session, event, sample); 958 if (evsel == NULL) { 959 ++session->hists.stats.nr_unknown_id; 960 return 0; 961 } 962 if (machine == NULL) { 963 ++session->hists.stats.nr_unprocessable_samples; 964 return 0; 965 } 966 return tool->sample(tool, event, sample, evsel, machine); 967 case PERF_RECORD_MMAP: 968 return tool->mmap(tool, event, sample, machine); 969 case PERF_RECORD_COMM: 970 return tool->comm(tool, event, sample, machine); 971 case PERF_RECORD_FORK: 972 return tool->fork(tool, event, sample, machine); 973 case PERF_RECORD_EXIT: 974 return tool->exit(tool, event, sample, machine); 975 case PERF_RECORD_LOST: 976 if (tool->lost == perf_event__process_lost) 977 session->hists.stats.total_lost += event->lost.lost; 978 return tool->lost(tool, event, sample, machine); 979 case PERF_RECORD_READ: 980 return tool->read(tool, event, sample, evsel, machine); 981 case PERF_RECORD_THROTTLE: 982 return tool->throttle(tool, event, sample, machine); 983 case PERF_RECORD_UNTHROTTLE: 984 return tool->unthrottle(tool, event, sample, machine); 985 default: 986 ++session->hists.stats.nr_unknown_events; 987 return -1; 988 } 989 } 990 991 static int perf_session__preprocess_sample(struct perf_session *session, 992 union perf_event *event, struct perf_sample *sample) 993 { 994 if (event->header.type != PERF_RECORD_SAMPLE || 995 !(session->sample_type & PERF_SAMPLE_CALLCHAIN)) 996 return 0; 997 998 if (!ip_callchain__valid(sample->callchain, event)) { 999 pr_debug("call-chain problem with event, skipping it.\n"); 1000 ++session->hists.stats.nr_invalid_chains; 1001 session->hists.stats.total_invalid_chains += sample->period; 1002 return -EINVAL; 1003 } 1004 return 0; 1005 } 1006 1007 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1008 struct perf_tool *tool, u64 file_offset) 1009 { 1010 int err; 1011 1012 dump_event(session, event, file_offset, NULL); 1013 1014 /* These events are processed right away */ 1015 switch (event->header.type) { 1016 case PERF_RECORD_HEADER_ATTR: 1017 err = tool->attr(event, &session->evlist); 1018 if (err == 0) 1019 perf_session__update_sample_type(session); 1020 return err; 1021 case PERF_RECORD_HEADER_EVENT_TYPE: 1022 return tool->event_type(tool, event); 1023 case PERF_RECORD_HEADER_TRACING_DATA: 1024 /* setup for reading amidst mmap */ 1025 lseek(session->fd, file_offset, SEEK_SET); 1026 return tool->tracing_data(event, session); 1027 case PERF_RECORD_HEADER_BUILD_ID: 1028 return tool->build_id(tool, event, session); 1029 case PERF_RECORD_FINISHED_ROUND: 1030 return tool->finished_round(tool, event, session); 1031 default: 1032 return -EINVAL; 1033 } 1034 } 1035 1036 static void event_swap(union perf_event *event, bool sample_id_all) 1037 { 1038 perf_event__swap_op swap; 1039 1040 swap = perf_event__swap_ops[event->header.type]; 1041 if (swap) 1042 swap(event, sample_id_all); 1043 } 1044 1045 static int perf_session__process_event(struct perf_session *session, 1046 union perf_event *event, 1047 struct perf_tool *tool, 1048 u64 file_offset) 1049 { 1050 struct perf_sample sample; 1051 int ret; 1052 1053 if (session->header.needs_swap) 1054 event_swap(event, session->sample_id_all); 1055 1056 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1057 return -EINVAL; 1058 1059 hists__inc_nr_events(&session->hists, event->header.type); 1060 1061 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1062 return perf_session__process_user_event(session, event, tool, file_offset); 1063 1064 /* 1065 * For all kernel events we get the sample data 1066 */ 1067 ret = perf_session__parse_sample(session, event, &sample); 1068 if (ret) 1069 return ret; 1070 1071 /* Preprocess sample records - precheck callchains */ 1072 if (perf_session__preprocess_sample(session, event, &sample)) 1073 return 0; 1074 1075 if (tool->ordered_samples) { 1076 ret = perf_session_queue_event(session, event, &sample, 1077 file_offset); 1078 if (ret != -ETIME) 1079 return ret; 1080 } 1081 1082 return perf_session_deliver_event(session, event, &sample, tool, 1083 file_offset); 1084 } 1085 1086 void perf_event_header__bswap(struct perf_event_header *self) 1087 { 1088 self->type = bswap_32(self->type); 1089 self->misc = bswap_16(self->misc); 1090 self->size = bswap_16(self->size); 1091 } 1092 1093 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1094 { 1095 return machine__findnew_thread(&session->host_machine, pid); 1096 } 1097 1098 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1099 { 1100 struct thread *thread = perf_session__findnew(self, 0); 1101 1102 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1103 pr_err("problem inserting idle task.\n"); 1104 thread = NULL; 1105 } 1106 1107 return thread; 1108 } 1109 1110 static void perf_session__warn_about_errors(const struct perf_session *session, 1111 const struct perf_tool *tool) 1112 { 1113 if (tool->lost == perf_event__process_lost && 1114 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) { 1115 ui__warning("Processed %d events and lost %d chunks!\n\n" 1116 "Check IO/CPU overload!\n\n", 1117 session->hists.stats.nr_events[0], 1118 session->hists.stats.nr_events[PERF_RECORD_LOST]); 1119 } 1120 1121 if (session->hists.stats.nr_unknown_events != 0) { 1122 ui__warning("Found %u unknown events!\n\n" 1123 "Is this an older tool processing a perf.data " 1124 "file generated by a more recent tool?\n\n" 1125 "If that is not the case, consider " 1126 "reporting to linux-kernel@vger.kernel.org.\n\n", 1127 session->hists.stats.nr_unknown_events); 1128 } 1129 1130 if (session->hists.stats.nr_unknown_id != 0) { 1131 ui__warning("%u samples with id not present in the header\n", 1132 session->hists.stats.nr_unknown_id); 1133 } 1134 1135 if (session->hists.stats.nr_invalid_chains != 0) { 1136 ui__warning("Found invalid callchains!\n\n" 1137 "%u out of %u events were discarded for this reason.\n\n" 1138 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1139 session->hists.stats.nr_invalid_chains, 1140 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]); 1141 } 1142 1143 if (session->hists.stats.nr_unprocessable_samples != 0) { 1144 ui__warning("%u unprocessable samples recorded.\n" 1145 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1146 session->hists.stats.nr_unprocessable_samples); 1147 } 1148 } 1149 1150 #define session_done() (*(volatile int *)(&session_done)) 1151 volatile int session_done; 1152 1153 static int __perf_session__process_pipe_events(struct perf_session *self, 1154 struct perf_tool *tool) 1155 { 1156 union perf_event *event; 1157 uint32_t size, cur_size = 0; 1158 void *buf = NULL; 1159 int skip = 0; 1160 u64 head; 1161 int err; 1162 void *p; 1163 1164 perf_tool__fill_defaults(tool); 1165 1166 head = 0; 1167 cur_size = sizeof(union perf_event); 1168 1169 buf = malloc(cur_size); 1170 if (!buf) 1171 return -errno; 1172 more: 1173 event = buf; 1174 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1175 if (err <= 0) { 1176 if (err == 0) 1177 goto done; 1178 1179 pr_err("failed to read event header\n"); 1180 goto out_err; 1181 } 1182 1183 if (self->header.needs_swap) 1184 perf_event_header__bswap(&event->header); 1185 1186 size = event->header.size; 1187 if (size == 0) 1188 size = 8; 1189 1190 if (size > cur_size) { 1191 void *new = realloc(buf, size); 1192 if (!new) { 1193 pr_err("failed to allocate memory to read event\n"); 1194 goto out_err; 1195 } 1196 buf = new; 1197 cur_size = size; 1198 event = buf; 1199 } 1200 p = event; 1201 p += sizeof(struct perf_event_header); 1202 1203 if (size - sizeof(struct perf_event_header)) { 1204 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1205 if (err <= 0) { 1206 if (err == 0) { 1207 pr_err("unexpected end of event stream\n"); 1208 goto done; 1209 } 1210 1211 pr_err("failed to read event data\n"); 1212 goto out_err; 1213 } 1214 } 1215 1216 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1217 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1218 head, event->header.size, event->header.type); 1219 err = -EINVAL; 1220 goto out_err; 1221 } 1222 1223 head += size; 1224 1225 if (skip > 0) 1226 head += skip; 1227 1228 if (!session_done()) 1229 goto more; 1230 done: 1231 err = 0; 1232 out_err: 1233 free(buf); 1234 perf_session__warn_about_errors(self, tool); 1235 perf_session_free_sample_buffers(self); 1236 return err; 1237 } 1238 1239 static union perf_event * 1240 fetch_mmaped_event(struct perf_session *session, 1241 u64 head, size_t mmap_size, char *buf) 1242 { 1243 union perf_event *event; 1244 1245 /* 1246 * Ensure we have enough space remaining to read 1247 * the size of the event in the headers. 1248 */ 1249 if (head + sizeof(event->header) > mmap_size) 1250 return NULL; 1251 1252 event = (union perf_event *)(buf + head); 1253 1254 if (session->header.needs_swap) 1255 perf_event_header__bswap(&event->header); 1256 1257 if (head + event->header.size > mmap_size) 1258 return NULL; 1259 1260 return event; 1261 } 1262 1263 int __perf_session__process_events(struct perf_session *session, 1264 u64 data_offset, u64 data_size, 1265 u64 file_size, struct perf_tool *tool) 1266 { 1267 u64 head, page_offset, file_offset, file_pos, progress_next; 1268 int err, mmap_prot, mmap_flags, map_idx = 0; 1269 size_t page_size, mmap_size; 1270 char *buf, *mmaps[8]; 1271 union perf_event *event; 1272 uint32_t size; 1273 1274 perf_tool__fill_defaults(tool); 1275 1276 page_size = sysconf(_SC_PAGESIZE); 1277 1278 page_offset = page_size * (data_offset / page_size); 1279 file_offset = page_offset; 1280 head = data_offset - page_offset; 1281 1282 if (data_offset + data_size < file_size) 1283 file_size = data_offset + data_size; 1284 1285 progress_next = file_size / 16; 1286 1287 mmap_size = session->mmap_window; 1288 if (mmap_size > file_size) 1289 mmap_size = file_size; 1290 1291 memset(mmaps, 0, sizeof(mmaps)); 1292 1293 mmap_prot = PROT_READ; 1294 mmap_flags = MAP_SHARED; 1295 1296 if (session->header.needs_swap) { 1297 mmap_prot |= PROT_WRITE; 1298 mmap_flags = MAP_PRIVATE; 1299 } 1300 remap: 1301 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1302 file_offset); 1303 if (buf == MAP_FAILED) { 1304 pr_err("failed to mmap file\n"); 1305 err = -errno; 1306 goto out_err; 1307 } 1308 mmaps[map_idx] = buf; 1309 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1310 file_pos = file_offset + head; 1311 1312 more: 1313 event = fetch_mmaped_event(session, head, mmap_size, buf); 1314 if (!event) { 1315 if (mmaps[map_idx]) { 1316 munmap(mmaps[map_idx], mmap_size); 1317 mmaps[map_idx] = NULL; 1318 } 1319 1320 page_offset = page_size * (head / page_size); 1321 file_offset += page_offset; 1322 head -= page_offset; 1323 goto remap; 1324 } 1325 1326 size = event->header.size; 1327 1328 if (size == 0 || 1329 perf_session__process_event(session, event, tool, file_pos) < 0) { 1330 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1331 file_offset + head, event->header.size, 1332 event->header.type); 1333 err = -EINVAL; 1334 goto out_err; 1335 } 1336 1337 head += size; 1338 file_pos += size; 1339 1340 if (file_pos >= progress_next) { 1341 progress_next += file_size / 16; 1342 ui_progress__update(file_pos, file_size, 1343 "Processing events..."); 1344 } 1345 1346 if (file_pos < file_size) 1347 goto more; 1348 1349 err = 0; 1350 /* do the final flush for ordered samples */ 1351 session->ordered_samples.next_flush = ULLONG_MAX; 1352 flush_sample_queue(session, tool); 1353 out_err: 1354 perf_session__warn_about_errors(session, tool); 1355 perf_session_free_sample_buffers(session); 1356 return err; 1357 } 1358 1359 int perf_session__process_events(struct perf_session *self, 1360 struct perf_tool *tool) 1361 { 1362 int err; 1363 1364 if (perf_session__register_idle_thread(self) == NULL) 1365 return -ENOMEM; 1366 1367 if (!self->fd_pipe) 1368 err = __perf_session__process_events(self, 1369 self->header.data_offset, 1370 self->header.data_size, 1371 self->size, tool); 1372 else 1373 err = __perf_session__process_pipe_events(self, tool); 1374 1375 return err; 1376 } 1377 1378 bool perf_session__has_traces(struct perf_session *self, const char *msg) 1379 { 1380 if (!(self->sample_type & PERF_SAMPLE_RAW)) { 1381 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1382 return false; 1383 } 1384 1385 return true; 1386 } 1387 1388 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1389 const char *symbol_name, u64 addr) 1390 { 1391 char *bracket; 1392 enum map_type i; 1393 struct ref_reloc_sym *ref; 1394 1395 ref = zalloc(sizeof(struct ref_reloc_sym)); 1396 if (ref == NULL) 1397 return -ENOMEM; 1398 1399 ref->name = strdup(symbol_name); 1400 if (ref->name == NULL) { 1401 free(ref); 1402 return -ENOMEM; 1403 } 1404 1405 bracket = strchr(ref->name, ']'); 1406 if (bracket) 1407 *bracket = '\0'; 1408 1409 ref->addr = addr; 1410 1411 for (i = 0; i < MAP__NR_TYPES; ++i) { 1412 struct kmap *kmap = map__kmap(maps[i]); 1413 kmap->ref_reloc_sym = ref; 1414 } 1415 1416 return 0; 1417 } 1418 1419 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1420 { 1421 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 1422 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 1423 machines__fprintf_dsos(&self->machines, fp); 1424 } 1425 1426 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1427 bool with_hits) 1428 { 1429 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); 1430 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); 1431 } 1432 1433 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1434 { 1435 struct perf_evsel *pos; 1436 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1437 1438 ret += hists__fprintf_nr_events(&session->hists, fp); 1439 1440 list_for_each_entry(pos, &session->evlist->entries, node) { 1441 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1442 ret += hists__fprintf_nr_events(&pos->hists, fp); 1443 } 1444 1445 return ret; 1446 } 1447 1448 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1449 { 1450 /* 1451 * FIXME: Here we have to actually print all the machines in this 1452 * session, not just the host... 1453 */ 1454 return machine__fprintf(&session->host_machine, fp); 1455 } 1456 1457 void perf_session__remove_thread(struct perf_session *session, 1458 struct thread *th) 1459 { 1460 /* 1461 * FIXME: This one makes no sense, we need to remove the thread from 1462 * the machine it belongs to, perf_session can have many machines, so 1463 * doing it always on ->host_machine is wrong. Fix when auditing all 1464 * the 'perf kvm' code. 1465 */ 1466 machine__remove_thread(&session->host_machine, th); 1467 } 1468 1469 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1470 unsigned int type) 1471 { 1472 struct perf_evsel *pos; 1473 1474 list_for_each_entry(pos, &session->evlist->entries, node) { 1475 if (pos->attr.type == type) 1476 return pos; 1477 } 1478 return NULL; 1479 } 1480 1481 void perf_event__print_ip(union perf_event *event, struct perf_sample *sample, 1482 struct machine *machine, int print_sym, 1483 int print_dso, int print_symoffset) 1484 { 1485 struct addr_location al; 1486 struct callchain_cursor_node *node; 1487 1488 if (perf_event__preprocess_sample(event, machine, &al, sample, 1489 NULL) < 0) { 1490 error("problem processing %d event, skipping it.\n", 1491 event->header.type); 1492 return; 1493 } 1494 1495 if (symbol_conf.use_callchain && sample->callchain) { 1496 1497 if (machine__resolve_callchain(machine, al.thread, 1498 sample->callchain, NULL) != 0) { 1499 if (verbose) 1500 error("Failed to resolve callchain. Skipping\n"); 1501 return; 1502 } 1503 callchain_cursor_commit(&callchain_cursor); 1504 1505 while (1) { 1506 node = callchain_cursor_current(&callchain_cursor); 1507 if (!node) 1508 break; 1509 1510 printf("\t%16" PRIx64, node->ip); 1511 if (print_sym) { 1512 printf(" "); 1513 symbol__fprintf_symname(node->sym, stdout); 1514 } 1515 if (print_dso) { 1516 printf(" ("); 1517 map__fprintf_dsoname(node->map, stdout); 1518 printf(")"); 1519 } 1520 printf("\n"); 1521 1522 callchain_cursor_advance(&callchain_cursor); 1523 } 1524 1525 } else { 1526 printf("%16" PRIx64, sample->ip); 1527 if (print_sym) { 1528 printf(" "); 1529 if (print_symoffset) 1530 symbol__fprintf_symname_offs(al.sym, &al, 1531 stdout); 1532 else 1533 symbol__fprintf_symname(al.sym, stdout); 1534 } 1535 1536 if (print_dso) { 1537 printf(" ("); 1538 map__fprintf_dsoname(al.map, stdout); 1539 printf(")"); 1540 } 1541 } 1542 } 1543 1544 int perf_session__cpu_bitmap(struct perf_session *session, 1545 const char *cpu_list, unsigned long *cpu_bitmap) 1546 { 1547 int i; 1548 struct cpu_map *map; 1549 1550 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1551 struct perf_evsel *evsel; 1552 1553 evsel = perf_session__find_first_evtype(session, i); 1554 if (!evsel) 1555 continue; 1556 1557 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1558 pr_err("File does not contain CPU events. " 1559 "Remove -c option to proceed.\n"); 1560 return -1; 1561 } 1562 } 1563 1564 map = cpu_map__new(cpu_list); 1565 if (map == NULL) { 1566 pr_err("Invalid cpu_list\n"); 1567 return -1; 1568 } 1569 1570 for (i = 0; i < map->nr; i++) { 1571 int cpu = map->map[i]; 1572 1573 if (cpu >= MAX_NR_CPUS) { 1574 pr_err("Requested CPU %d too large. " 1575 "Consider raising MAX_NR_CPUS\n", cpu); 1576 return -1; 1577 } 1578 1579 set_bit(cpu, cpu_bitmap); 1580 } 1581 1582 return 0; 1583 } 1584 1585 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1586 bool full) 1587 { 1588 struct stat st; 1589 int ret; 1590 1591 if (session == NULL || fp == NULL) 1592 return; 1593 1594 ret = fstat(session->fd, &st); 1595 if (ret == -1) 1596 return; 1597 1598 fprintf(fp, "# ========\n"); 1599 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1600 perf_header__fprintf_info(session, fp, full); 1601 fprintf(fp, "# ========\n#\n"); 1602 } 1603